External Harddrive no longer recognized

Hey all.
Ok, so I have a 15" MBP and I bought a 1 TB external HD firewire 800 because I needed stuff for my video editing. Everything worked perfectly, I would unplug it and plug it in all the time (properly and improperly). Well I recently moved and it won't be recognized by the laptop anymore. It is plugged in and on and everything works fine. When I plug it in, the harddrive makes noises and then nothing happens. It does NOT appear in disk utility either. There is a switch on the harddrive to make it so whenever the harddrive is plugged into something, it turns on. When I plug it into the laptop it still turns on yet the laptop does not recognize it.

Welcome to Apple Discussions!
A couple of possibilities are a bad FW cable, a failed FW chip in the external drive, and your FW 800 port not working.
Do other FW peripherals work? If not try a SMC Reset:
http://support.apple.com/kb/HT1411?viewlocale=en_US
If so, try another FW cable. If the drive has USB capability, see if DU sees it with a USB cable.
If the Mac can see the drive with USB, but not with FW, you might be able to put the drive in a different enclosure and have FW capability again. Look for an enclosure with an Oxford 924+ chipset.
Good luck!

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Xpetepan wrote:
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Hello everyone, this is not necessarily a mac mini issue
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hello, i dont have a UPS but have it connected to a power strip
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External Harddrive no longer recognized

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